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Post AwQbrIUd40kBQ9vIlE by [email protected] |
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Post #AwQbrGSmbu4x7r2nbc by [email protected] |
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the SMS card is the building block used by IBM's 1401 computer from the … |
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Post #AwQbrGaw7abJX8rJJY by [email protected] |
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I've plugged it into my socket adapter so I can provide power and test sign… |
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Post #AwQbrGijeaq5vKVXTE by [email protected] |
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this is the schematic. it is a "2-way logic block" of the type "… |
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Post #AwQbrGqXBb4sJW9lcu by [email protected] |
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@tubetime I was wondering why there are more components on the board than in th… |
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Post #AwQbrH1WWjrsrbIXku by [email protected] |
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hmm, this output works, but it is very slow, almost a full microsecond. now to … |
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Post #AwQbrHIBWnCBhH5qj2 by [email protected] |
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the second output was much the same. the third is fast, but it only falls to -4… |
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Post #AwQbrHaGRZeobLYHuC by [email protected] |
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OK, here's our problem. this output is stuck at -6V, which means that the t… |
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Post #AwQbrHt3JigbXcLIBs by [email protected] |
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i checked the base-emitter junction with a multimeter in diode check mode, and … |
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Post #AwQbrIBqBriOTt8ITY by [email protected] |
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the "slow" gates are caused by the fact that someone has been in here… |
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Post #AwQbrIUd40kBQ9vIlE by [email protected] |
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a better substitute is the 2N2894. not sure if i have any of those -- time to g… |
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Post #AwWlMPwFUqJc1eW2ZU by [email protected] |
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@tubetime I like the ability to work in either orientation. 💯 |
